Provide formulas and problem solving steps

1. Anna purchased four contracts of WXO 28 call option at a quoted price of $.30. What is her net gain on this investment if the price of WXO is $31 on the option expiration date?

2. Tru-U stock is selling for $36 a share. A 3-month call on Tru-U stock with a strike price of $40 is priced at $1. Risk-free assets are currently returning 0.25% per month. What is the price of a 3-month put on Tru-U stock with a strike price of $40?

3. 2. Suppose you look in the newspaper and see ABC trading at $50 per share. Calls on ABC with one month to expiration and an exercise price of $45 are trading at $6.50 each. Puts on ABC with one month to expiration and an exercise price of $55 are trading at $3.50 each. Are these prices reasonable? Explain. (Ignore transactions costs.)

4. A mortgage banker had made loan commitments for $20 million in three months. How many contracts on Treasury bonds futures must the banker write or buy?

5. You sold a put contract on EDF stock at an option price of $.50. The option had an exercise price of $21. The option was exercised. Today, EDF stock is selling for $20 a share. What is your total profit or loss on all of your transactions related to EDF stock assuming that you close out your positions in this stock today? Ignore transaction costs and taxes.